pin knative.dev/pkg so that it compiles

[dprotaso]

tektoncd uses an old metrics package we dropped. thus we need to
wait for them to migrate away before resuming these bumps

For now we pin knative.dev/pkg

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.72%. Comparing base (46266c9) to head (0b74451).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2986      +/-   ##
==========================================
+ Coverage   57.96%   59.72%   +1.75%     
==========================================
  Files         132      132              
  Lines       16944    16944              
==========================================
+ Hits         9821    10119     +298     
+ Misses       6222     5868     -354     
- Partials      901      957      +56     

Flag	Coverage Δ
e2e-tests	40.99% <ø> (+7.62%)	⬆️
integration-tests	54.46% <ø> (+1.69%)	⬆️
unit-tests	46.66% <ø> (+0.01%)	⬆️

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[gauron99]

We can bump the tekton we use I think

[dprotaso]

tekton hasn't made the necessary changes yet

[dprotaso]

This is a workaround to unblock knative dep updates

[gauron99]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, gauron99

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